1) one who has been liberated from slavery, a freedman, or the son of a freed man
2) Libertine, denotes Jews (according to Philo) who had been made captives of the Romans under Pompey but were afterwards set free; and who although they had fixed their abode in Rome, had built at their own expense a synagogue at Jerusalem which they frequented when in that city, The name Libertines adhered to them to distinguish them from free born Jews who had subsequently taken up their residence at Rome. Evidence seems to have been discovered of the existence of a "synagogue of the Libertines" at Pompeii.
Part of Speech: noun masculine
Citing in TDNT: 4:265, 533
Of Latin origin; a Roman freedman: - Libertine.
These two sites give similar information, with the definition from several dictionaries and statistics on the use of the word.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root Λιβερτῖνος; click on the second column to search for that grammatical form of the root Λιβερτῖνος; click on the third column to search for that word and grammatical form; click on the total to search for the root Λιβερτῖνος.